Add data validity check and retries in CST816S driver. See https://github.com/InfiniTimeOrg/InfiniTime/issues/763#issuecomment-962436976.
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@ -32,6 +32,18 @@ bool Cst816S::Init() {
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twiMaster.Read(twiAddress, 0xa7, &dummy, 1);
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vTaskDelay(5);
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static constexpr uint8_t maxRetries = 3;
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bool isDeviceOk = false;
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uint8_t retries = 0;
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do {
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isDeviceOk = CheckDeviceIds();
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retries++;
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} while(!isDeviceOk && retries < maxRetries);
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if(!isDeviceOk) {
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return false;
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}
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/*
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[2] EnConLR - Continuous operation can slide around
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[1] EnConUD - Slide up and down to enable continuous operation
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@ -50,21 +62,7 @@ bool Cst816S::Init() {
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static constexpr uint8_t irqCtl = 0b01110000;
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twiMaster.Write(twiAddress, 0xFA, &irqCtl, 1);
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// There's mixed information about which register contains which information
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if (twiMaster.Read(twiAddress, 0xA7, &chipId, 1) == TwiMaster::ErrorCodes::TransactionFailed) {
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chipId = 0xFF;
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return false;
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}
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if (twiMaster.Read(twiAddress, 0xA8, &vendorId, 1) == TwiMaster::ErrorCodes::TransactionFailed) {
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vendorId = 0xFF;
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return false;
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}
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if (twiMaster.Read(twiAddress, 0xA9, &fwVersion, 1) == TwiMaster::ErrorCodes::TransactionFailed) {
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fwVersion = 0xFF;
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return false;
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}
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return chipId == 0xb4 && vendorId == 0 && fwVersion == 1;
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return true;
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}
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Cst816S::TouchInfos Cst816S::GetTouchInfo() {
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@ -79,18 +77,33 @@ Cst816S::TouchInfos Cst816S::GetTouchInfo() {
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// This can only be 0 or 1
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uint8_t nbTouchPoints = touchData[touchPointNumIndex] & 0x0f;
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uint8_t xHigh = touchData[touchXHighIndex] & 0x0f;
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uint8_t xLow = touchData[touchXLowIndex];
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info.x = (xHigh << 8) | xLow;
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uint16_t x = (xHigh << 8) | xLow;
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uint8_t yHigh = touchData[touchYHighIndex] & 0x0f;
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uint8_t yLow = touchData[touchYLowIndex];
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info.y = (yHigh << 8) | yLow;
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uint16_t y = (yHigh << 8) | yLow;
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Gestures gesture = static_cast<Gestures>(touchData[gestureIndex]);
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// Validity check
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if(x >= maxX || y >= maxY ||
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(gesture != Gestures::None &&
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gesture != Gestures::SlideDown &&
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gesture != Gestures::SlideUp &&
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gesture != Gestures::SlideLeft &&
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gesture != Gestures::SlideRight &&
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gesture != Gestures::SingleTap &&
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gesture != Gestures::DoubleTap &&
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gesture != Gestures::LongPress)) {
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info.isValid = false;
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return info;
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}
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info.x = x;
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info.y = y;
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info.touching = (nbTouchPoints > 0);
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info.gesture = static_cast<Gestures>(touchData[gestureIndex]);
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info.gesture = gesture;
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info.isValid = true;
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return info;
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}
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@ -108,3 +121,21 @@ void Cst816S::Wakeup() {
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Init();
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NRF_LOG_INFO("[TOUCHPANEL] Wakeup");
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}
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bool Cst816S::CheckDeviceIds() {
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// There's mixed information about which register contains which information
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if (twiMaster.Read(twiAddress, 0xA7, &chipId, 1) == TwiMaster::ErrorCodes::TransactionFailed) {
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chipId = 0xFF;
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return false;
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}
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if (twiMaster.Read(twiAddress, 0xA8, &vendorId, 1) == TwiMaster::ErrorCodes::TransactionFailed) {
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vendorId = 0xFF;
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return false;
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}
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if (twiMaster.Read(twiAddress, 0xA9, &fwVersion, 1) == TwiMaster::ErrorCodes::TransactionFailed) {
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fwVersion = 0xFF;
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return false;
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}
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return chipId == 0xb4 && vendorId == 0 && fwVersion == 1;
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}
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@ -21,7 +21,7 @@ namespace Pinetime {
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uint16_t y = 0;
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Gestures gesture = Gestures::None;
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bool touching = false;
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bool isValid = true;
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bool isValid = false;
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};
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Cst816S(TwiMaster& twiMaster, uint8_t twiAddress);
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@ -45,6 +45,8 @@ namespace Pinetime {
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return fwVersion;
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}
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private:
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bool CheckDeviceIds();
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// Unused/Unavailable commented out
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static constexpr uint8_t gestureIndex = 1;
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static constexpr uint8_t touchPointNumIndex = 2;
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@ -58,6 +60,9 @@ namespace Pinetime {
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//static constexpr uint8_t touchXYIndex = 7;
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//static constexpr uint8_t touchMiscIndex = 8;
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static constexpr uint8_t maxX = 240;
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static constexpr uint8_t maxY = 240;
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TwiMaster& twiMaster;
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uint8_t twiAddress;
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